Improvement in clock-movements



n. Hnoncncu.

Clock-Movements.

Patented Dec. 22, 1874;

l mmillllll'llm .lll/[Ill UNrTnD STATES,

PATENT OFFICE..

ROBERT HITCHCOCK, OF WATERTOWN, NEV YORK.

IMPROVEMENT IN CLOCK-MOVEMENTS.

Specification forming part of Letters Patent No. 158,084., datedDecember 22, 1874; application filed August 27, 1874.

To all whom it may concern:

Beit known that I, ROBERT HrToncocK, oi' Watertown, J eii'erson county,New York, have invented certain new and useful Improvementsin Olock orSpring Movements, oi" which the following is a speciiication:

This improvement in clock or spring movements has been designed by mewith special reference to the use of the same in lamps employing eithera forced blast or oil-pump, or both, as illustrated, for instance, inLetters Pat ent granted to me April 23, 1872, N o. 125,954, January 7,1873, No. 134,547, August 12, 1873,

4No. 142,103, and December2,1873, No. 145,176.

I now give the movement a circular or cylindrical, instead of arectangular, form, its various parts being mounted in acylinder and onits head and accompanying upper plate, instead of upon or betweenrectangular plates, as heretofore. By the arrangement I have nowdevised, the adjustment and relations of the spring and its adjuncts,the train and all the parts or' the movement are materially changed fromthe old method; and I 'thereby secure the advantages of reduction of thenumber of parts, compactness, reduction of weight, cheapness, andincreased strength, durability, and regularity ot' running.

The manner in which I construct the movement in order to secure theabove-enumera ted advantages is as follows, reference being had to theaccompanying drawing, in which- Figure l is a vertical central sectionof my improved movement, representing also the position which itoccupies in the lamp. Fig. 2 is a perspective view of the movement. Fig.3 is a plan of the train. Fig. 4 is an underside view oi' theratchet-plate, which serves also to hold the movement in place in thelamp. The mainspring A is placed in a barrel, B, provided with heads aa. On the upper one is permanently ixed the main wheel O of themovement, in the form ot' an internal gear, which constitutes part ofthe mainspring barrel. This gear produces greater uniformity of actionin the train, for the reason that more teeth of the gear are in bearingupon the teeth or leaves of its pinion than is the case with gears ofthe opposite kind, and also for the reason that the pinion moves in thesame direction with the gear, instead of reversely, as is the case inmovements heretofore employed. This kind of gear-wheel also makespracticable such a construction of the movement as to bring within thecircumference of the cylinder all the wheels or' the train. Thethickness of the main gear-wheel, and consequently its strength, can beincreased without changing the relations ot' the other parts, whichcannot be done with the kind heretofore employed. The cylindrical jacketD, which incloses the mainspring-barrel, is provided with a permanenthead, d, upon which is mounted the train of wheels of the movement, thishead also serving as one of the bearings o of the mainspring-arbor G.The jacket is a substitute for the ordinary pillars, is much strongerthan pillars, and is also a protector against dust and dirt. The plateE, which is fitted to the lower end of the jacket, and secured to it bylugs and pins, serves as the mounting for the ratchet b, clicks, andclicksprings, cf, and as the other bearin g of the mainspring-arbor. Themainspring-arbor projects through the last-mentioned plate, and in theoperation of winding the mainspring-barrel revolves freely in itsjacket. This plate E is also a dust and dirt protector. Upon the upperend or head of the jacket is mounted a plate, g, by means or' pillarsIt, between which head and plate is mounted the train of wheels of themovement. Fitting the exterior of the jacket, at its upper end, is acap, F, employed as a dust-protector. The sleeve i on the side of thecap is for the passage through it of one of the pump rods j in case apump is used.

By the means thus employed, the dust and dirt are as eii'ectuallyexcluded from the running parts of the movement as is practicable,

and oil also is excluded when the movement is employed in lamps. Thetrain of; wheels ot' the movement, mounted between the head d and plateg, is shown in Fig. 8. lll/'heel 2 is driven by pinion 1, which projectsdown through the head, so as to engage the internal gear-wheel,as seenin Fig. 1, the lower journal of the pinion taking its bearing in abracket projecting laterally from center bearing o. From wheel 2movement is communicated to wheel 3 and its pinion; thence to wheel aand its pinion, and wheels 5 and (l and their pinions, thence tocrown-wheel 7,

thence to vertical worm-wheel 8, which drives Worm-shaft 9, on the upperend of which, in case the movement is used for producing a blast, ismounted the fan 10, by which the air is driven to the dame. The upperend of the Worm-shaft 9 takes its bearing on across-piece on a cap orsleeve surrounding the fan. The pump-rod j is actuated by means of pinson wheel 4, which strike projecting arms on rod j and compel it to rocl;or vibrate.

It is of course understood lthat one end of the mainspring is fast tothe barrel, and the other end is fast to the arbor.

The power of the movement, when used in lamps can be increased byWidening the spring Without an increase of the diameter of themainspring-barrel, and Without loss of oilspacein the lamp. The movementhas been described with special reference to its use in lamps, but itmay be employed for other purposes.

Having described my invention, what I claim, and desire to secure byLetters Patent, 1s

1. The combination, with the mainsprinp,r and mainspring-barrcl, of thetrain arranged above, and Within the compass of the prolongation of, thebarrel, and on vertical axes, substantially as shown and set forth.

2. The combination, with the train and mainspring, of themainspring-barrel and internal gear main Wheel, fixed to and formingpart of the head of the barrel, as shown and set forth.

3. In combination with the mainspring and mainspring` barrel and arbor,the jacket having two heads, the upper one supporting the train, and thelower one constituting the ratchet-plate.

4. The dust-cap inclosing the train, and extending down to, and so as toform a continuation of, the jacket, as shown and set forth.

1n testimony whereof I have hereunto signed my name this 17th day ofAugust., A. D. 1874.

ROBERT HITCHCOCK.

Witnesses:

S. P. NEWELL, L. P. GOODWIN.

